Richard and Jo
I liked their scenes together. I think Jo needs a father figure. She's never had that and I think Richard can help her deal with the mess everything has become.
I remember when he was in the hospital, after the blackout, when he was hurt. He was there for Thanksgiving and Jo and the other interns planed to have Thanksgiving dinner with him. He's the ultimate father figure.
I know a lot of people hate on Jo, but I like her and I think we'll learn more about her this season.